How do you unlock costume in god of war ghost of Sparta

I don't know which you are talking about but for god armor you need to finish the game same gos for deimos, for robotos you need to buy him in the temple of Zeus for 25 000 red orbs (hes the first lion to your right i think) to unlock legionnaire you need to use a code that came with the game if you preordered and for ghost of Sparta armor you need to finish the game on god difficulty.